Sis″kin (?), n. [Dan. sisgen; cf. Sw. siska, G. zeisig, D. sijsje; of Slav. origin; cf. Pol. czy�.] (Zoöl.) (a) A small green and yellow European finch (Spinus spinus, or Carduelis spinus); — called also aberdevine. (b) The American pinefinch (S. pinus); — called also pine siskin. See Pinefinch.
☞ The name is applied also to several other related species found in Asia and South America.
Siskin green, a delicate shade of yellowish green, as in the mineral torbernite.